Well done! And thanks for the link to the grill mod. I've thought about that but now I know that it makes sense - so I know what I'm going to do tomorrow after work...

I have the same setup like you do now - MB-Airbox, K&N's, larger Inlet-tubes - plus the 74mm-Throttlebody. Did you also notice a different intake noise - a bit louder and more aggressive. Or is that just my imagination?